[Radiance-general] luminaire modelling .ies data

Marija Cvetkovic cveleglg at bankerinter.net
Tue Apr 4 15:40:13 CEST 2006


Hi Christian,

> 
> What do i have to write when i have the same vertical angles but 
> additionally these
> horizontal values and a rectangular shape?
> degrees: 0  2.5  5  7.5  10  12.5  15  17.5  20  25  30  35  40  45  50  
> 55  60  65  70  75  80  85  (22)
> values: (22) i guess ;-)
> 1623 1628 1634 1641 1658 1677 1705 1744 1786 1885 2064 2254 2546 2905 
> 3247 3864 4579 6024 7642 9496 8984 30789

For each vertical angle you should have values for all horizontal 
angles. So the number of candela values is:
num_of_vertical_angles * num_of_horizontal angles

You can find IES file format specification in document "Thinking 
Photometrically" on the site:http://www.helios32.com/resources.htm


I hope this helps you,
Marija




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